>Nirvana will get in from a 90's Iconic perspective and they
>will go in like NWA more for a One Album domiance and Cultural
>shift more than the actual albums their after and impact
>after there respective first albums.

Without Nirvana in the loop the 90's Alternative nation and the '00's indie rock movement which dominated the rock landscape does NOT happen.

Dislike their music, but I think it's very easy to make a case they are top ten influential rock bands of all times. You can argue they made no impact songwriting/music composition wise(and I would disagree), but as far as creating a brand new lane for artists in mainstream rock and roll it's undeniable.

I can make the same argument on NWA: you hop back in and assassinate them and hip-hop itself changes drastically and it goes beyond introducing Dre as a megaproducer and Snoop as an MC. Rappers from 50 Cent to Kendrick Lamar have a much harder time making name for themselves.